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Section 1 Earth's Crust in Motion

Vocabulary

earthquake- the shaking and trembling that results from the movement of rock beneath Earth's surface
stress- a force hat acts on rock to change it's size or volume
shearing- stress that pushes a mass of rock in two opposite directions
tension- stress that pulls and stretches a rock
compression-stress that squeezes a rock together
deformation- any change in volume or shape of earth's crust
fault- a break in earth's crust where rocks slip past each other
strike-slip fault- a fault where rocks in opposite directions slip past sideways
normal fault- a fault that is at an angle so one block of rock is on top the other on the bottom, the bottom one is the
hanging wall
hanging wall- a block of rock that lie above the fault
foot wall- a block of rock that lies below the fault
fault black mountain- a moutian made when a fault lifts up a block of rock
fold- when compression bends parts of earth's crust
anticlines- a fold in rock bending upward
syncline- a fold in rock, bending downward
plateau- large area of flat land above sea level

Outline

Introduction

• Earthquakes are a reminder the crust can move.

Stress in the Crust

• Earth's plates create powerful forces.

Types of Stress

• Shearing
• Tension
• Compression

Kinds of Faults

• Strike-Slip Fault
• Normal Fault
• Reverse Fault

Friction Along Faults

• How a rock moves on a fault is according to friction

Mountian Building

• Mountians formed by faulting
  • Fault block mountians
• Mountians formed by folding
• Anticlines and Synclines
• Plateaus